Low-copy nuclear data confirm rampant allopolyploidy in the cystopteridaceae (Polypodiales)
Abstract
© International Association for Plant Taxonomy (IAPT) 2014. Here we present the first
nuclear phylogeny for Cystopteridaceae (Polypodiales), using the single-copy locus
gapCp “short”. This phylogeny corroborates broad results from plastid data in demonstrating
strong support for the monophyly of the family’s three genera—Cystopteris, Acystopteris,
and Gymnocarpium—and of the major groups within Cystopteris (C. montana, the sudetica
and bulbifera clades, and the C. fragilis complex). In addition, it confirms the rampant
hybridization (allopolyploidy) that has long been suspected within both Cystopteris
and Gymnocarpium. In some cases, these data provide the first DNA-sequence-based evidence
for previous hypotheses of polyploid species origins (such as the cosmopolitan G.
dryopteris being an allotetraploid derivative of the diploids G. appalachianum and
G. disjunctum). Most of the allopolyploids, however, have no formal taxonomic names.
This pattern is particularly strong within the C. fragilis complex, where our results
imply that the eight included accessions of “C. fragilis” represent at least six distinct
allopolyploid taxa.
Type
Journal articleSubject
Science & TechnologyLife Sciences & Biomedicine
Plant Sciences
Evolutionary Biology
amplicon cloning
Cystopteris fragilis
fern phylogeny
Gymnocarpium
hybridization
reticulate evolution
species complex
RETICULATE EVOLUTION
NORTH-AMERICAN
MORPHOLOGICAL EVOLUTION
COMPLEX
DRYOPTERIDACEAE
ORIGINS
PTERIDOPHYTA
CHROMOSOME
FERNS
DNA
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https://hdl.handle.net/10161/21758Published Version (Please cite this version)
10.12705/635.32Publication Info
Rothfels, CJ; Johnson, AK; Windham, MD; & Pryer, KM (2014). Low-copy nuclear data confirm rampant allopolyploidy in the cystopteridaceae (Polypodiales).
Taxon, 63(5). pp. 1026-1036. 10.12705/635.32. Retrieved from https://hdl.handle.net/10161/21758.This is constructed from limited available data and may be imprecise. To cite this
article, please review & use the official citation provided by the journal.
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Kathleen M. Pryer
Professor of Biology

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